/**
 * Response formatters for AgentPay MCP tools.
 * Converts on-chain bigint/hex values to human-readable MCP content.
 */
import type { Address, Hash } from 'viem';
/**
 * Format a bigint wei amount as a readable ETH string.
 * e.g., 1000000000000000000n → "1.000000 ETH"
 */
export declare function formatEth(wei: bigint): string;
/**
 * Format a bigint token amount with the given decimals.
 * e.g., 1000000n with decimals=6 → "1.000000 USDC"
 */
export declare function formatToken(amount: bigint, decimals: number, symbol: string): string;
/**
 * Format a bigint as a readable ETH or "N/A" if zero/unlimited.
 * Used for spend limits where 0 means "no autonomous spending allowed".
 */
export declare function formatSpendLimit(wei: bigint): string;
/**
 * Format an address with a label. Truncates middle for readability.
 */
export declare function formatAddress(address: Address): string;
/**
 * Format a full address (for display in detailed outputs).
 */
export declare function formatAddressFull(address: Address): string;
/**
 * Format seconds as human-readable duration.
 */
export declare function formatDuration(seconds: number): string;
/**
 * Format a Unix timestamp as ISO string.
 */
export declare function formatTimestamp(ts: number): string;
/**
 * Get a utilization badge based on percentage used.
 */
export declare function utilizationBadge(pct: number): string;
export declare function chainName(chainId: number): string;
export declare function explorerTxUrl(txHash: Hash, chainId: number): string;
export declare function explorerAddressUrl(address: Address, chainId: number): string;
/**
 * Create a standard MCP text content block.
 */
export declare function textContent(text: string): {
    type: 'text';
    text: string;
};
/**
 * Format an error into a human-readable MCP error response text.
 */
export declare function formatError(error: unknown, context: string): string;
/**
 * Format a success message with optional details.
 */
export declare function formatSuccess(message: string, details?: Record<string, string>): string;
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